Transmission-gearing for automobiles.



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2 SHEETS-SHEET l.

110. 896,034. 111111111111 AUG;11,-19o8. G. 1. 1111101111111.. TRANSMISSION GEARING PoR ,111101110111151 APPLIUATIVON FILED AP'RTMJQO 2 SHEETS-SHEET 2.

p o'bject UNITED STATES 'PATENT OFFICE. v

I\` GROVER IRA MITCHELL, OF CORNELL, ILLINOIS.

TRNSMISSIONeGEARING FOR AUTOMOBILES.

To all w71 omI it may concern: v

Be it known that I, Gnovnn IRA MITcnnLL, a citizen of the United States, residing at Cornell, in the county'of State of Illinois, have inventeda new and useful Transmission-Gearing for Automobiles, and I do hereby declare the following description of enable others appertains to tlji" invention, such as will skilled in the art to which it make and use the same.

his invention relates to transmission gearing for motor vehicles 5 and it has for its to simplify and improve the construction and operation of this class of devices, and to rovide a transmission gearing which shall at mit ofthe vehicle being operated by irect transmission, at a high `rate of speed, or by intermediate friction gearing at any rate of speed that may be desired, at the pleasure 4and election of the operator. With these and other ends in view which will readily appear as the natureof the invent1on is 'better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claims. In the accompanying drawings has been illustrated simple and preferred form `of the invention it being however Iunderstood that no limitation is necessarily made to the recise structural details therein exhibited, ut that changes, alterations and modifications within the scope of the invention may be resorted to when desired. I

In the drawings`lf`igure 1 is a top plan view of a transmission. gearing constructed in upon the front cross-bar 6, which yand 7, which will invention. sectional view accordance with the Fig. 2 is a longitudinal pf e indicated by the line 2-2 in Fig. `1. ig. 3 is a detail view, in sectional elevation, taken on the plane indicated by the linehS, in Fig. 1.

Corresponding parts in the several gures are denoted by like characters of reference. A suitable frame is provided which includes the side-bars 5, 5,v and cross-pieces 6 be referred to in the following' description as the front and rear crossbars respectively. Supported for rotation is provided With a bearing 8 is a shaft 9 which is intended Speeication of Letters Patent. Application filed April 4, 1908. Serial No. 425,105.v

Livingston and4 taken on the A .31. v It Will be read Patented Aug. 11, 190g.

l to be driven from the motor direct g saidjshaft being provided with a thrust-bearing 10 which may be an anti-friction bearing' of any suitable construction; the shaft 9 also carries a `wheel or disk 11, the peripheral edge of which is adapted for frictional contact with the face of a disk 12 carried by a shaftl 13, which is supported for rotation upon one of the side-bars vof the frame, an additional bearing for said shaft being provided upon a longitudinal frame-bar 14. The shaft. 1,3 is supported slidably in its bearings, and it may be adjusted longitudinally of its axis, tby means of a lever 15 'capable of being actuated by a suitable treadl'e 16 through the medium of a system of intermediate links, bell-cranks and other connecting means, as indicated at 17, it being understood that any suitable means may. be employed for actuating the adjusting lever 15, and that the latter may be connected with the slidable shaft 13 in any suitable well-known manner.

Supported for rotation upon the rear crossbar 7 of the frame, in axial alinement with the shaft 9 is `the transn'iission shaft S having a solid rear portion 18 and a tubular front portion 19, which latter externally engages a Sleeve 20 carrying a friction cone or clutch member 21 adapted for frictional engagement with a recess 22 in the rear face of.'the wheel or disk 11 carried by the motor driven shaft 9. The tubular shaft portion 19 has an internal shoulder or offset 23 affording a caring for one end of a coiled spring 24, the opposite end of, Iwhich is dis osed to bear against the rear side of the c utch member 21, so that the latter by the'ac ion of said spring may be forced intofrictional engage ment with4 the walls of the recess 22 in the rear sidepf the disk 11. Alink or rou 55, suitably connected with the clutch member 21, extends longitudinally through the coiled springZlt and t irough the tubular shaft-sec tlon 19 which latter is rovided with aslot or a erture 26 through which the rod 25 is suit-l a ly connected with an annularly grooved pin 27, which is slidably mounted upon the said tubular shaft-section Where it is capable of adjustment by means of ashipping lever 28 actuated by means of a link 29 and a rockshaft 30 having an Ap-perating lever or handle n y seen that by menipu latingl the latter handle the spring '24 may be compressed, to disengage the clutch member 21 from the disk 11, or said spring may be released to place said cone and disk in frictional engagement for the transmission of motion,

4 may when desired.

Slidably mounted upon the shaft section 19 is a hub or collar 32 carrying a disk 33, the peripheral edge of Which is adapted for frictional engagement with the face of the fric tion disk 12 the hub 32 has an annular groove 34 engaged by a ring 35 connected with a shipping rod 36 one end of which is equipped with a rack 37 `engaged by a pinion 38 upon a rock-shaft 39 which is capable of being operated by a lever or handle 40, for the urpose of effecting adjustment of the friction wheel 33, axially upon its supporting shaft, and towards or from the ce'nter of the friction disk 12. A spline 41 serves to connect the hub or collar 32 for rotation with the tubular portion 19 of the shaft S; the speed of rotation of the latter being governed by the position of the wheel 33 relative to the friction-disk 12, when the latter is in use. spring supported idler 42 is arrange to engage the face of the friction disk 12 in a position about diametrically opposite to the contact points of the wheels 11 and 33 with the face of said disk. I

From the foregoing description taken'in connection with the drawings hereto an nexed, the operation and advantages of this invention wi l be readily understood by those skilled in the art to which it appertains. By operating the treadle 16 the friction disk 12 be placed in engagement with the periphcry of the disk or wheel 11 carriedby the motor driven shaft 9, and said disk 12 will transmit motion to the shaft S through the medium of the wheel 33, the speed being regulated by the position of said wheel 33 relative to the center of the disk 12. Then a direct drive at high speed is desired, the lever 31 is operated to place the cone-clutch 'member 21 in engagement with the walls of the recess 22 in 11, and motion will thus be transi/nitted from the latter direct to the shaft S which'is geared in the usual manner to the rear axle.

By this improved gearin the s eed may be changed gradually from ow to igh, and the direct transmission device may be thrown into operation at anytime without interferwhich is used The conand thorwith the friction-gearing for the transmission of low speed. struction is simple, inexpensive,

oughly efficient foi-.the purposes for which it isrovided.

' aving thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In a transmission gearing for automo-`V biles, a motor-driven shaft having a thrust bearing, a wheel upon said shaft having a p friction rim, a transmission shaft suitably supported in axial alinement with the motordriven shL ft, ahub supported slidably and adjustably upon the transmission shaft or rotation therewith and carrying a wheel having a friction-rim, a shaft supported slidably at right-angles to the motor driven shaft a friction disk carried by said motor diivenshaft adapted for engagement with the rims of y driven shaft and the transmission shaft, and

a spring supported idler adapted for engage.

ment with the face of the friction disk.

2. In a transmission gearing for automobiles, a motor-driven shaft, a transmission shaft supported in axial alinement therewith and having a tubular portion, a friction wheel upon the motor-driven shaft having a conical recess, a,V spring actuated sleeve slidable in the tubular portion of the transmis.

sion shaft a clutch member carried by said transmission shaft adapted to engage the recess in the friction wheel upon the'motor- .driven shaft, means for compressing the spring to release the cone-pulley, and means independent of the clutch member-for conveyin motion to the transmission shaft from t e motor-driven shaft.

3. In a transmission gearing 'for automobiles, a motor-driven shaft, a friction wheel u on said shaft having a recess, atransmission shaft supported in axial alinetnent with the motorfdriven shaft and having a tubular ortion, a spring actuated sleeve slidable in the wheels upon thecmotor-Y said tubular portion a cone-clutch ,member connected with said slidable sleeve facing` the recess in the wheel upon thei, motordriven shaft, means for compressing the spring to effect pulley, a hub su )ported slidably` upon'the transmission sha t and carrying a, wheel having a friction rim, a shaft supported slidably at right angles to the motor driven shaft a friction disk carried by`said motor driven shaft adapted for engagement with the rims of the .wheels upon the motor driven and the transmission shaftsi and means foi-'effecting adjustment of thel. slidable shaft. i

4. In a transmission gearing fory automobiles, a suitably sup orted motorfdriven shaft, a wheel inounte( upon said shaft rovided with a conical recess in ,the yrear face thereof, in combination with a transmission shaft supported for'rotation in axial alinement with said motor-driven shaft and havadjustment of the: cone- 1 ing a tubular portion provided with an'inshaft section between the clutch nwlnbe-r upon the sleeve and the shoulder in thu shaft secton an hpnl-ming rnd connwt'cll with the cone-clutch membermnlextemling axially through thc shalt, and @pointing means cnnnuclvd with ,will rnd through a slot. in the tubular shaft svctfinn.-

In testimony whereof I have signed my name to this specifcation'in the presence of two Subscribing Witnesses.

GROVER IRA MITCHELL. Vitnesscs: l

A. E. TIFFANY, P. H, JONES. 

